diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5336b6ac..26e8b860 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -41,6 +41,7 @@ Special thanks to the following contributors: @B1gG, @codac, @ezeholz, @khassel,
 - Fix fetch option httpsAgent to agent in calendar module (#466)
 - Fix module updatenotification which did not work for repos with many refs (#1907)
 - Fix config check failing when encountering let syntax ("Parsing error: Unexpected token config")
+- Fix calendar debug check
 
 ## [2.15.0] - 2021-04-01
 
diff --git a/modules/default/calendar/debug.js b/modules/default/calendar/debug.js
index f01bcc0d..f2d3a48e 100644
--- a/modules/default/calendar/debug.js
+++ b/modules/default/calendar/debug.js
@@ -5,6 +5,9 @@
  * By Michael Teeuw https://michaelteeuw.nl
  * MIT Licensed.
  */
+// Alias modules mentioned in package.js under _moduleAliases.
+require("module-alias/register");
+
 const CalendarFetcher = require("./calendarfetcher.js");
 
 const url = "https://calendar.google.com/calendar/ical/pkm1t2uedjbp0uvq1o7oj1jouo%40group.calendar.google.com/private-08ba559f89eec70dd74bbd887d0a3598/basic.ics"; // Standard test URL
@@ -26,11 +29,13 @@ const fetcher = new CalendarFetcher(url, fetchInterval, [], maximumEntries, maxi
 fetcher.onReceive(function (fetcher) {
 	console.log(fetcher.events());
 	console.log("------------------------------------------------------------");
+	process.exit(0);
 });
 
 fetcher.onError(function (fetcher, error) {
 	console.log("Fetcher error:");
 	console.log(error);
+	process.exit(1);
 });
 
 fetcher.startFetch();